Pottery-molding machine.



PATENTED MAR. 7, 1905. L. MARY.

POTTERY MOLDING MACHINE.

APPLICATION FILED JULY 29. 1904.

Fig.2 A-B No. aeaoto.

Patented March '7, 1905.

LOUl'S MARY, OF FEGERSHEHVI, (SrElftli IANY.

POTTERY-MOLDING lVlACHlNE.

SPECIFICATION forming part of Letters Patent No. 784,059, dated March 7,1905. Application filed July 29, 1904. Serial No. 218,671.

To (all whom it may concern:

Be it known that I, LoUIs MARY, a subject of the Emperor of Germany, anda resident of Fegersheim, Alsace, German Empire, have invented certainnew and useful Improvements in Pottery-Molding Machines, of which thefollowing is a specification.

My invention relates to a machine for manu- In descending theflaslesections are separated automatically by concealed springs, and thecore is of such construction that its periphery only contacts with theinterior of the pot at certain parts, so that the article when molded isreadily released.

For the above reasons the new machine, while being of the simplestconstruction, is of very high capacity.

in the accompanying drawings, Figure l is a side elevation of themachine. Fig. 2 is a front elevation, partly in section, on line A B ofFig. 1. Fig. 3 is a sectional plan taken on the line C D of Fig. 2. Fig.4 is an elevation of the core, and Fig. 4 represents a horizontalsection through the same.

The split flask is held in a frame or carrier 6, which has bosses or, bymeans of which it can he slid up and down on the guide-rods a. Thismotion is imparted in well-known manner by means of the cams 0, havinggrooves a, in which run rollers mounted on levers la,

connected by links a and screw-collarsmto the bosses i is a cylindricalblock fitting-into the carrier tand centrally recessed to receive thetwo sections g constituting the split flask. These sections are held inthe open position by means of the springs (Z, Fig. 3, and are closed bythe aid of projecting plates .2, secured to the ends of the sections andof adjustable plates or armsf, pendent from the head-beamof the machineand carrying rollers r at their lower extremities.

k is the plate constituting the bottom of the flask, upon which the massof clay to be molded is placed. The flask is then raised, so that theplates come in contact with the rollers r, and as the plates areprovided with chami'ered edges the sections will gradually be pressedtogether and close upon the core 6. The sections will maintain thisposition until on completion of molding the frame I descends, wherebythe plates .2 are removed from contact with the rollers r, so that thesections separate again under the action of the springs (I, thusreleasing the molded article. This arrangement has the ad vantage thatthe springs (Z are only in a state of tension during the short period ofmolding. in the position of rest of the machine they can expand freely,whereby their life considerably increased. Since, however, theresistance of the springs must be overcome prior to and during moldingof the pot, the carrier 25 must work with positive motion and the levers/r. must be rigidly connected with the guide-bosses :11, so that motionof the flask must always follow that of the cam-grooves or other drivingparts.

.In order that the molded pot may not adhere to the core, the latter isfurnished with slightly-rounded ribs 7), Figs. t and 4:", projecting tothe extent of, say, one millimeter from the surface of the core-body,whereby its rotation will enlarge the pot to a small extent,sul'iiciently to insure the presence of a thin layer of air between coreand pot.

What I claim is- 1. in a pottery-molding machine, the combination with arotary core and vertically-reciprocating flask-carrying frame, ofdisconnected flask-sections held by the frame and adapted to move inhorizontal lines toward and from each other, springs for moving thesections entirely away from each other, and automatically-operated meansfor raising the sections and pressing them together during theirascending movement, substantiallyas set forth.

2. In a pottery-molding machine having a rotary core and aflask-carrying frame vertically reciprocated with positive motion, ablock held in the said frame, spring-controlled flask-sections locatedin said block, members protruding from the said flask-sections, and

IQ means contacting with the said protruding

